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Plant Industry - Plant Protection Section

Imported Fire Ant Treatments

Approved Imported Fire Ant (IFA)Treatments for Nursery Stock, Balled or in Containers:

Method A - Immersion

Equipment - An open-top, watertight immersion tank sufficiently large to accommodate the treating solution and plants will be needed. Drain plugs and valves will facilitate drainage after treatment.


Locate the immersion tank in a well-ventilated place. The location should be covered if possible. Do not remove burlap wrap or plastic containers with drain holes prior to immersion. Immerse soil balls and containers, singly or in groups so that soil is completely covered by the insecticidal solution. Plants must remain in the solution until bubbling ceases. After removal from dipping tank, plants may be placed on a drain board until adequately drained. Thorough saturation of the plant balls or containers with the insecticide solution is essential.

As treating progresses, freshly prepared insecticide solution should be added to maintain liquid level at immersion depth. Dispose of tank contents within 8 hours after mixing to prevent pH hydrolysis if water is highly alkaline.

Precautions - Disposal must comply with all State and local regulations. Runoff of the solution from treatment areas should not be permitted. Excess solution (and used solution) must be disposed of in accordance with State and local regulations.

Pesticide - Emulsifiable chlorpyrifos (EC).

Dosage -

    Amount of formulation to prepare
100 gal treating solution

4EC     4 fl oz (118 mL)
2EC     8 fl oz (236 mL)

Exposure Period - Plants can be certified immediately upon completion of treatment.

Certification Period - 30 days.

Precaution - Wear rubber gloves, boots, and apron during this operation.

Note:  Environmental factors significantly affect phytotoxicity. It is recommended that a small group of plants be treated at the recommended rate under the anticipated growing conditions and observed for phytotoxic symptoms for at least 7 days before a large number of plants are treated. Dwarf yaupon, some varieties of azaleas, camellias, poinsettias, rose bushes and variegated ivy may exhibit phytotoxicity.

Use this link to view and/or print a listing of MITIGATIVE MEASURES required to minimize the impact of IFA quarantine treatments on the environment and human health.
Mention of companies or commercial products does not imply recommendation or endorsement by NCDA&CS over others not mentioned. NCDA&CS neither guarantees or warrants the performance of any product mentioned. This information is believed to be correct, but the user of the product is responsible for reading and following the label.




NCDA&CS Plant Industry Division - Plant Protection Section
Plant Pest Administrator - Phillip L. Wilson
Mailing Address: 1060 Mail Service Center, Raleigh NC 27699-1060
Physical Address: 216 West Jones Street, Raleigh NC 27603
Phone: 919) 707-3753 | FAX: (919) 733-1041